Textiles: fiber preparation – Working – Drafting
Patent
1994-11-14
1996-07-16
Crowder, C. D.
Textiles: fiber preparation
Working
Drafting
19236, 57 97, D01H 574
Patent
active
055354815
ABSTRACT:
In a textile machine with a drafting arrangement and textile spindles, the spindles are driven by an electric main drive. The drafting arrangement cylinders are coupled so that their speed is a given proportion of the speed of the main drive. The coupling is via a position-controlled brushless D.C. motor with electronic commutation for driving the drafting arrangement. An additional flywheel mass on the drafting arrangement drive is dimensioned so that the slowing-down time of the drafting arrangement is of the same order as the slowing-down time of the main drive, resulting in controlled slowing-down conditions if the voltage suddenly fails. The drafting arrangement motor can be made much smaller than hitherto. Also, the starting and slowing-down conditions can be accurately and sensitively controlled, thus reducing the risk of thread breakages.
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Hartmeier Werner
Huppi Stefan
Crowder C. D.
Rieter Machine Works Ltd.
Worrell Jr. Larry D.
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